Question from a newbie: how to properly use space
when reference to variables, array, hash etc.
please see the code below:
why the first line, second, and third line all output differiently.
thanks.
ciwei
========code below ======
#!/usr/bin/perl
my %ttys =();
open ( WHO, "who|") or die "can;t \n";
while ( <WHO> ){
( $user, $tty ) = split ;
push @{$ttys{ $user}} , $tty;
}
foreach $user ( sort keys %ttys ){
print "first line : $user => @{$ttys {$user}} \n";
print "second line: $user => @ {$ttys { $user}} \n";
print "third line: $user => @{$ttys{$user}} \n";
}
__OUTPUT__
first line : root =>
second line: root => @ { { root}}
third line: root => pts/1 pts/4 pts/6 pts/7 pts/8
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